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Handle return value 0 from ExtEscape as special case (means to use the default driver)

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svn path=/trunk/; revision=10177
This commit is contained in:
Gregor Anich 2004-07-17 15:13:37 +00:00
parent 13bc74184a
commit 1bd5f9a981
1 changed files with 9 additions and 6 deletions
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7
reactos/lib/opengl32/wgl.c
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@ -291,18 +291,21 @@ ROSGL_ICDForHDC( HDC hdc )
/* get driver name */
ret = ExtEscape( hdc, EXT_GET_DRIVERINFO, sizeof (dwInput), (LPCSTR)&dwInput,
sizeof (EXTDRIVERINFO), (LPSTR)&info );
if (ret < 0)
if (ret <= 0)
{
HKEY hKey;
DWORD type, size;
if (ret < 0)
{
DBGPRINT( "Warning: ExtEscape to get the drivername failed!!! (%d)", GetLastError() );
if (MessageBox( WindowFromDC( hdc ), L"Couldn't get installable client driver name!\nUsing default driver.",
L"OPENGL32.dll: Warning", MB_OKCANCEL | MB_ICONWARNING ) == IDCANCEL)
{
SetLastError( ret );
SetLastError( 0 );
return NULL;
}
}
/* open registry key */
ret = RegOpenKeyExW( HKEY_LOCAL_MACHINE, OPENGL_DRIVERS_SUBKEY, 0, KEY_READ, &hKey );